Cell shape and mechanical load

Why a cartilage cell that spreads out stops making cartilage, the cytoskeleton that enforces it, and the channels that turn pressure into a signal.

A cartilage cell spread flat on a stiff surface has thick stress fibres, YAP in the nucleus and SOX9 off. The same cell held round has a thin ring of cortical actin, SOX9 on and matrix laid down around it. SOX9 ↓YAP in the nucleusSOX9 ↑collagen II, aggrecanSpreadRoundstress fibres, stiff surfacecortical actin, soft or 3D

Chondrogenesis is marked by a tight dependence between cell shape, cytoskeletal organisation and the onset of cartilage gene expression. The cytoskeleton carries that dependence and acts on SOX9.

In this article

  • Turning pressure into a signal
  • Physical inputs
  • Signalling between cells
  • Compounds

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